Raining areas are square-shaped

I have found problems on Windytv maps, specially on rain/snow and cloud maps, which have worsened a lot with the new update. Areas of square-shaped rain or clouds have been detected over Central Atlantic (from North Brazil to Central Africa) and in Northeast Brazil, for example. I'm sure rain doesn't behave this way. These errors suggest these are either bugs or missing data, and prevent us from understanding weather on affected areas.